ABSTRACT In this paper, degradation mechanisms of optical materials, used in the light emitting diode (LED)-based products, are reviewed. The LED lighting is one of the fastest technology shifts in human history. Lighting accounts for almost 20% of the global electrical energy use, inferring that replacement of traditional lighting sources with LEDs with higher efficiencies will have major positive implications for the global energy consumption. Organic optical materials are key components in LEDs in the sense that they control the functionality of the device and they have decisive effects on the durability and reliability of LEDs. This paper aims at describing the influences of chemical structure and service conditions on the degradation mechanisms of organic optical materials in LEDs which lead to the lumen depreciation, discolouration, and colour shift of the LED light output. The contributions of different degradation mechanisms of optical and package materials in LED-based products to the lumen depreciation and colour shift are methodically reviewed.

中文翻译：

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固态照明系统中光学材料的降解

摘要 本文综述了用于发光二极管 (LED) 产品的光学材料的降解机制。LED 照明是人类历史上最快的技术变革之一。照明占全球电能使用量的近 20%，推断用效率更高的 LED 替代传统照明光源将对全球能源消耗产生重大的积极影响。有机光学材料是 LED 的关键组件，因为它们控制着设备的功能，并且对 LED 的耐用性和可靠性具有决定性的影响。本文旨在描述化学结构和使用条件对 LED 有机光学材料降解机制的影响，这些降解机制导致 LED 光衰、变色、和 LED 光输出的色移。系统地回顾了基于 LED 的产品中光学和封装材料的不同降解机制对流明衰减和色偏的贡献。